<?php

/**
 * Argument handler for to modify depth for a previous term.
 *
 * This handler is actually part of the node table and has some restrictions,
 * because it uses a subquery to find nodes with
 */
class views_handler_argument_term_node_tid_depth_modifier extends views_handler_argument {

    function options_form(&$form, &$form_state) {
        
    }

    function query() {
        
    }

    function pre_query() {
        // We don't know our argument yet, but it's based upon our position:
        $argument = isset($this->view->args[$this->position]) ? $this->view->args[$this->position] : NULL;
        if (!is_numeric($argument)) {
            return;
        }

        if ($argument > 10) {
            $argument = 10;
        }

        if ($argument < -10) {
            $argument = -10;
        }

        // figure out which argument preceded us.
        $keys = array_reverse(array_keys($this->view->argument));
        $skip = TRUE;
        foreach ($keys as $key) {
            if ($key == $this->options['id']) {
                $skip = FALSE;
                continue;
            }

            if ($skip) {
                continue;
            }

            if (empty($this->view->argument[$key])) {
                continue;
            }

            if (isset($handler)) {
                unset($handler);
            }

            $handler = &$this->view->argument[$key];
            if (empty($handler->definition['accept depth modifier'])) {
                continue;
            }

            // Finally!
            $handler->options['depth'] = $argument;
        }
    }

}

